Woah, hold on there. It takes a while for people to notice a new post on a certain thread, you know. =P
1-1: Nice improvements. You might be going a little too far with the detons, but I'll keep my decision with what everyone else says. As for bugs and glitches, there's an area where the chain rings, um... do something to the ceiling. Also, the door after that area has a ceiling flat that should be changed into the sky background. Lastly, the sky at the goal doesn't seem to have the dimensions of the sky. It kinda just looks like wallpaper plastered onto the goalroom. Otherwise, looks good, especially for a first level.
1-2: I'll admit, I do like fighting multiple Eggmen, which is why Arena Zone is my favorite in Mystic Realm. I beat this on my first try (thanks to Knuckles, 'cause I kept falling into the pits). I'm sure someone will have a problem with it, but I don't.
2-1: Also nice. Interesting how you make the character talk upon reaching a certain area. My only question is how this will affect coop games, though.... That and how the last waterfall can be that fast while obeying the laws of physics are my only beef(s).